<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8">
		<meta http-equiv="X-UA-Compatible" content="IE=edge">
		<meta name="viewport" content="width=device-width, initial-scale=1.0">
		<title>Document</title>
		<style>
			.aaa{
				border: 1px solid blue;
				width: 300px;
				height: 300px;
				background: #ccc;
				overflow: hidden;
			}
			ul{
				width: calc(300px * 6);
				height: 300px;
				list-style: none;
				margin: 0;
				padding: 0;
				animation: move 5s linear infinite;
			}
			li{
				float: left;
				width: 300px;
				height: 300px;
				outline: 1px solid red;
			}
			@keyframes move {
				from {
					transform: translateX(0);
				}
				to {
					transform: translateX(calc(-300px * 5));
				}
			}
		</style>
	</head>
	<body>
		<div class="aaa">
			<ul>
				<li>1111</li>
				<li>2222</li>
				<li>3333</li>
				<li>4444</li>
				<li>5555</li>
				<li>1111</li>
			</ul>
		</div>
	</body>
</html>

<script type="text/javascript">

</script>
